iRhythm Ownership | Who Owns iRhythm?

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iRhythm Ownership Summary

iRhythm is owned by 77.52% institutional investors, 0.87% insiders, and 21.61% retail investors. Tudor investment corp et al is the largest institutional shareholder, holding 63.31% of IRTC shares. Sands Capital Global Growth Equity is the top mutual fund, with 4.68% of its assets in iRhythm shares.

IRTC Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	iRhythm	77.52%	0.87%	21.61%
Sector	Healthcare Stocks	232.63%	10.66%	-143.29%
Industry	Medical Device Stocks	37.54%	10.61%	51.85%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Tudor investment corp et al	20.00M	63.31%	$27.45M
Vanguard group	3.31M	10.29%	$587.42M
Blackrock funding, inc. /de	2.81M	8.75%	$499.31M
Artisan partners limited partnership	2.57M	8.13%	$441.59M
Blackrock	2.50M	8.03%	$269.35M
Sands capital management	2.24M	7.08%	$384.59M
Capital research global investors	1.18M	3.68%	$210.22M
State street	847.88K	2.68%	$145.83M
Geode capital management	858.40K	2.67%	$152.34M
Ubs asset management americas	829.86K	2.58%	$147.25M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Kampmann melissa s.	22.62K	2.74%	$3.70M
First light asset management	155.10K	2.51%	$26.68M
Next century growth investors	189.08K	2.37%	$32.52M
Rock springs capital management lp	235.00K	2.36%	$40.42M
Ophir asset management pty	101.56K	2.16%	$17.47M
Healthinvest partners ab	37.58K	2.13%	$6.67M
Eventide asset management	691.51K	1.96%	$118.92M
Williamson legacy group	12.35K	1.71%	$2.19M
Stephens investment management group	519.33K	1.20%	$92.15M
Braidwell lp	225.84K	1.15%	$38.84M

Top Buyers

Holder	Shares	% Assets	Change
Tudor investment corp et al	20.00M	0.05%	20.00M
Millennium management	399.75K	0.02%	339.53K
Polar capital	335.91K	0.28%	334.56K
Jpmorgan chase	758.59K	0.01%	319.15K
Price t rowe associates inc /md/	339.64K	0.01%	313.39K

Top Sellers

Holder	Shares	% Assets	Change
Sands capital management	2.24M	1.06%	-679.42K
Fiera capital	-	-	-381.64K
Champlain investment partners	-	-	-365.63K
Slate path capital lp	-	-	-365.40K
Alyeska investment group	-	-	-351.75K

New Positions

Holder	Shares	% Assets	Change	Value
Tudor investment corp et al	20.00M	0.05%	20.00M	$27.45M
Jain global	131.09K	0.11%	131.09K	$22.55M
Perceptive advisors	123.00K	0.61%	123.00K	$21.15M
Norges bank	56.24K	0.00%	56.24K	$9.98M
Steadfast capital management lp	39.70K	0.12%	39.70K	$6.83M

Sold Out

Holder	Change
Coppell advisory solutions	-1.00
Caitong asset management	-1.00
National bank of canada /fi/	-1.00
Wealthspire advisors	-1.00
Twin peaks wealth advisors	-2.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	278	-20.11%	24,936,629	-28.15%	77	0.64%	122	-29.07%	98	-14.04%
Sep 30, 2025	333	5.38%	54,680,163	54.50%	169	1.35%	164	-2.38%	112	19.15%
Jun 30, 2025	316	18.35%	35,390,802	-1.62%	112	0.86%	169	26.12%	93	9.41%
Mar 31, 2025	8	-96.69%	1,629,968	-95.25%	5	0.04%	4	-96.43%	4	-95.35%
Dec 31, 2024	147	-44.11%	24,053,140	-29.85%	76	0.64%	71	-47.79%	51	-23.88%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Sands Capital Global Growth Equity	1.51M	4.68%	-488.05K
Vanguard US Total Market Shares ETF	1.01M	3.21%	68.62K
Canada Life US Small-Mid Cap Growth A	1.00M	3.19%	-41.02K
Vanguard Total Stock Mkt Idx Inv	1.01M	3.14%	2.49K
iShares Russell 2000 ETF	770.36K	2.38%	126.22K
Vanguard Small Cap Index	729.79K	2.26%	-188.00
American Funds New Economy A	625.22K	1.93%	-
Capital Group New Economy Comp	625.22K	1.93%	-
Canada Life US Small-Mid Cap Growth F	551.66K	1.72%	-31.05K
Eventide Gilead N	464.25K	1.44%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Mar 16, 2026	Smith Mervin	EVP Strategic Business Ops	Sell	$295.47K
Mar 02, 2026	Turakhia Minang	CHIEF MED/SCI OFCR EVP ADVTECH	Sell	$168.26K
Mar 02, 2026	Turakhia Minang	CHIEF MED/SCI OFCR EVP ADVTECH	Sell	$158.00K
Mar 02, 2026	Turakhia Minang	CHIEF MED/SCI OFCR EVP ADVTECH	Sell	$191.00K
Mar 02, 2026	Shrishrimal Sumi	EVP, Chief Risk Officer	Sell	$121.50K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	37
2025 Q4	-	10
2025 Q3	-	17
2025 Q2	-	8
2025 Q1	-	16

IRTC Ownership FAQ

Who Owns iRhythm?

iRhythm shareholders are primarily institutional investors at 77.52%, followed by 0.87% insiders and 21.61% retail investors. The average institutional ownership in iRhythm's industry, Medical Device Stocks, is 37.54%, which iRhythm exceeds.

Who owns the most shares of iRhythm?

iRhythm’s largest shareholders are Tudor investment corp et al (20M shares, 63.31%), Vanguard group (3.31M shares, 10.29%), and Blackrock funding, inc. /de (2.81M shares, 8.75%). Together, they hold 82.35% of iRhythm’s total shares outstanding.

Does Blackrock own iRhythm?

Yes, BlackRock owns 8.03% of iRhythm, totaling 2.5M shares as of Jun 2024. This represents 0.01% of BlackRock's total assets, with a market value of 269.35M$. In the last quarter, BlackRock increased its holdings by 61.23K shares, a 2.51% change.

Who is iRhythm’s biggest shareholder by percentage of total assets invested?

Kampmann melissa s is iRhythm’s biggest shareholder by percentage of total assets invested, with 2.74% of its assets in 22.62K iRhythm shares, valued at 3.7M$.

Who is the top mutual fund holder of iRhythm shares?

Sands Capital Global Growth Equity is the top mutual fund holder of iRhythm shares, with 4.68% of its total shares outstanding invested in 1.51M iRhythm shares.

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